@ -25,6 +25,10 @@
# include <asm/arch/pinmux.h>
# include <asm/arch/gp_padctrl.h>
# include "pinmux-config-cardhu.h"
# include <i2c.h>
# define PMU_I2C_ADDRESS 0x2D
# define MAX_I2C_RETRY 3
/*
* Routine : pinmux_init
@ -41,3 +45,50 @@ void pinmux_init(void)
/* Initialize any non-default pad configs (APB_MISC_GP regs) */
padgrp_config_table ( cardhu_padctrl , ARRAY_SIZE ( cardhu_padctrl ) ) ;
}
# if defined(CONFIG_TEGRA_MMC)
/*
* Do I2C / PMU writes to bring up SD card bus power
*
*/
void board_sdmmc_voltage_init ( void )
{
uchar reg , data_buffer [ 1 ] ;
int i ;
i2c_set_bus_num ( 0 ) ; /* PMU is on bus 0 */
/* TPS659110: LDO5_REG = 3.3v, ACTIVE to SDMMC1 */
data_buffer [ 0 ] = 0x65 ;
reg = 0x32 ;
for ( i = 0 ; i < MAX_I2C_RETRY ; + + i ) {
if ( i2c_write ( PMU_I2C_ADDRESS , reg , 1 , data_buffer , 1 ) )
udelay ( 100 ) ;
}
/* TPS659110: GPIO7_REG = PDEN, output a 1 to EN_3V3_SYS */
data_buffer [ 0 ] = 0x09 ;
reg = 0x67 ;
for ( i = 0 ; i < MAX_I2C_RETRY ; + + i ) {
if ( i2c_write ( PMU_I2C_ADDRESS , reg , 1 , data_buffer , 1 ) )
udelay ( 100 ) ;
}
}
/*
* Routine : pin_mux_mmc
* Description : setup the MMC muxes , power rails , etc .
*/
void pin_mux_mmc ( void )
{
/*
* NOTE : We don ' t do mmc - specific pin muxes here .
* They were done globally in pinmux_init ( ) .
*/
/* Bring up the SDIO1 power rail */
board_sdmmc_voltage_init ( ) ;
}
# endif /* MMC */